i'm guessing RM800? for a standard* brochure site.
pick one-
design-wise:depends on the quality of your work.
total = estimated hours needed x the value of your time
but don't tell them that you decided the cost based on hours...

business-wise: depends on the maximum amount the client is willing to pay.

remember, cheap clients always demand more than they pay for and almost never worth the trouble...try not to go below RM400?

*subjective

freelance, companies prolly charge RM2000 and above

well, unless you can provide the same amount of quality as the rest, it would serve no purpose to match their price. And if you do it anyway knowing yours is of a lower quality, it means quality itself is not the determinant factor, and you might as well just charge as much as the client would pay... this means no pricelist. Realistically, like goldfries mentioned, there is no such thing as a standard price given that each has their own range of services and design. It's like asking the standard price of cars... thus the RM800 i quoted earlier can be liken to stating that the standard price of cars is RM70,000. I hope you get what I mean.

so i recommend you do a bit of research on your own and google around for malaysian web design companies ( <--these are not the keywords! ), i've seen quite a few put up their price list as well as the service that they provide. From there, form your own conclusion and decide a price that is right for you.